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usb: chipidea: move otg related things to otg file

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Move otg related things to otg file.

Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen
2013-08-14 12:44:10 +03:00
committed by Greg Kroah-Hartman
parent c344b51800
commit cbec6bd55a
3 changed files with 70 additions and 52 deletions
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57
drivers/usb/chipidea/otg.c
View File

@@ -24,12 +24,65 @@
#include "otg.h"
/**
* ci_hdrc_otg_init - initialize otgsc bits
* ci_otg_role - pick role based on ID pin state
* @ci: the controller
*/
enum ci_role ci_otg_role(struct ci_hdrc *ci)
{
u32 sts = hw_read(ci, OP_OTGSC, ~0);
enum ci_role role = sts & OTGSC_ID
? CI_ROLE_GADGET
: CI_ROLE_HOST;
return role;
}
/**
* ci_role_work - perform role changing based on ID pin
* @work: work struct
*/
static void ci_role_work(struct work_struct *work)
{
struct ci_hdrc *ci = container_of(work, struct ci_hdrc, work);
enum ci_role role = ci_otg_role(ci);
if (role != ci->role) {
dev_dbg(ci->dev, "switching from %s to %s\n",
ci_role(ci)->name, ci->roles[role]->name);
ci_role_stop(ci);
ci_role_start(ci, role);
}
enable_irq(ci->irq);
}
/**
* ci_hdrc_otg_init - initialize otg struct
* ci: the controller
*/
int ci_hdrc_otg_init(struct ci_hdrc *ci)
{
ci_enable_otg_interrupt(ci, OTGSC_IDIE);
INIT_WORK(&ci->work, ci_role_work);
ci->wq = create_singlethread_workqueue("ci_otg");
if (!ci->wq) {
dev_err(ci->dev, "can't create workqueue\n");
return -ENODEV;
}
return 0;
}
/**
* ci_hdrc_otg_destroy - destroy otg struct
* ci: the controller
*/
void ci_hdrc_otg_destroy(struct ci_hdrc *ci)
{
if (ci->wq) {
flush_workqueue(ci->wq);
destroy_workqueue(ci->wq);
}
ci_disable_otg_interrupt(ci, OTGSC_INT_EN_BITS);
ci_clear_otg_interrupt(ci, OTGSC_INT_STATUS_BITS);
}